Military Trainer - You have found a trainer, he shall train your survivors to engage in basic combat and fiend off wildlife and/or hositle beings
Merchant - You found an Merchant , he or she shall help you trade with the tribal beings and/or set up trade routes
Spy - You have managed to find a Spy , an Spy shall give you political intrigue on other groups
Exploration Gear - Various Gear to Explore the Island , and uncover lands and other treasures
Thinking of more, but this is a start :P